As part of the Heads Together #oktosay films, Lady Gaga has joined Prince William in the latest video to help people speak openly about mental health.

The World Premiere of the film aired on the Royal Family’s Facebook page. Lady Gaga spoke to the Duke of Cambridge over FaceTime located in Los Angeles and London respectively.

Lady Gaga started the Born This Way Foundation, which she wrote an open letter speaking of her Post Traumatic Stress Disorder from being assaulted.

Prince William admired Lady Gaga’s “openness” in her letter and asked her to lend her hand to the Heads Together campaign.

The two talked about how simply talking about mental health can help “shatter the stigma” around the disease.

Lady Gaga applauded the “beautiful stories” told by different people in a set of powerful films under the #oktosay banner. She also noted how those facing mental health challenges no longer have to hide. Prince William added that “‘to feel normal about mental health – it’s the same as physical health’ and that good conversations can ‘really make such a difference.’”

Lady Gaga from her place in LA. Kensington Palace/Heads Together

From Lady Gaga’s kitchen and the Duke of Cambridge’s Kensington living room, the two agreed that they would meet up in the United Kingdom this October to continue their work towards ending the stigma that continues to surround mental health, Lady Gaga saying “we have to make the strongest, most relentless attempt we can to normalise mental health issues.”

The Duke and Lady Gaga would like to focus on youth.

Prince William has said before that the Duchess of Cambridge and he hope that their children, Prince George and Princess Charlotte will be able to talk about their problems and reach out of help need be.

The #oktosay film series can be viewed on the Heads Together YouTube page and website. The films feature people such as model Adwoa Aboa, Stephen Fry, and footballer Rio Ferdinand.